What do you guys think does the most explanatory work in QFT? @InertialObservr @MattersDarkly
Correlation functions, S-matrix, scattering elements, cross sections, etc.? Lots of people have talked about realism wrt. fields and particles, but not much wrt. these objects
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More fundamentally would be the invariant matrix element for a given process, it essentially decouples all of the quantum stuff from the SR and all of the things on your list are functions of these
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The ontology of QFT in my mind is one of the most difficult possible tasks.. a “hard problem” if you will, to abuse Daniel Chalmers phrase
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It requires at its heart understanding wtf the QFT formalism is describing
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